Please see the following tax bill due dates for the Collar Counties: County First Installment Due Date Second Installment Due Date Pay Online Kane June 1, 2026 September 1, 2026 Kane County Treasurer Will June 1, 2026 September 1, 2026 Will County Treasurer DuPage June 1, 2026 September 1, 2026 […]
Category: Tax Bills
First installment property tax bills are now available online, and the Cook County Treasurer’s Office will be mailing the tax bills by March 2, 2026. Payment must be made by April 1, 2026 before interest penalties begin to accrue. The first installment for the 2025 taxes paid in 2026 will […]
The 2024 Cook County second installment property tax bills were mailed by the Treasurer’s Office as of November 14, 2025. The Treasurer’s Office must receive payment no later than December 15, 2025 to avoid penalty interest. The second installment property tax bills were substantially delayed due to various technical difficulties […]
Due to technical issues at the Assessor’s Office (“AO”), the AO missed a deadline to get reports to the Illinois Department of Revenue in a timely fashion. These reports are part of the process of finalizing the assessments and the second installment tax bills. Second installment tax bills are typically […]
First installment property tax bills were mailed by the Cook County Treasurer as of February 2, 2025. Payment must be made by March 4, 2025 before interest penalties begin to accrue. The first installment for the 2024 taxes paid in 2025 will be equal to 55% of the total 2023 […]